A new head holder for reducing axial movement and repositioning errors during physiological CT imaging.
A new head holder for reducing axial movement and repositioning errors during physiological CT imaging.
复制标题
一种新型头部固定器，可减少生理 CT 成像过程中的轴向移动和重新定位误差。
DOI：
10.1097/00004728-199403000-00036
复制
发表时间：
1994
影响因子：
1.3
通讯作者：
Groothuis,DR
中科院分区：
文献类型：
--
作者：
Shrawder,S;Lapin,GD;Allen,CV;Vick,NA;Groothuis,DR
目的：我们设计了一种新的头部保持器，用于脑动态CT研究中的固定和复位。材料和方法：定制热塑性面罩和泡沫头托，以限制头部在各个方向的运动，特别是在轴向平面外的运动结果：这种设计提供了一种刚性的，头部面部和后部的详细模具，可最大限度地减少长时间CT研究期间的运动，并能够准确地重新定位头部以进行跟踪-向上学习。直接应用于皮肤的标记被用来量化z-movement.Conclusion：当测试12名受试者，固定被限制在< 2.0毫米的最坏情况下的条件下，当受试者被要求尝试强迫运动。当受试者从头部保持器中取出，然后放回其中时，重新定位精确到< 1.5 mm。
Objective: We designed a new head holder for immobilization and repositioning in dynamic CT studies of the brain.Materials and Methods: A customized thermoplastic face mask and foam head rest were made to restrict movement of the head in all directions, but particularly out of the axial plane (z-movement).Results: This design provided a rigid, detailed mold of the face and back of the head that minimized motion during lengthy CT studies and enabled accurate repositioning of the head for follow-up studies. Markers applied directly to the skin were used to quantify z-movement.Conclusion: When tested on 12 subjects, immobilization was limited to< 2.0 mm under worst-case conditions when the subject was asked to attempt forced movements. Repositioning was accurate to< 1.5 mm when the subject was removed from the head holder and then placed back into it.